Re: Cabin pressure at altitude

Date:         03 Feb 97 03:18:34 
From:         "Barry Oliver" <barryo@wolfenet.com>
Organization: ICONS Software, Inc.
References:   1
Next article
View raw article
  or MIME structure

Dale B Rothert <rothertd@1st.net> wrote in article
<airliners.1997.381@ohare.Chicago.COM>...
> I am interested in what the average cabin pressure is in a B-747 or
> similar aircraft at crusing altitued. Presumed crusing is in the mid to
> upper 30's. It would be helpful in inches of mercury but a ratio of
> interior to exterior would serve the purpose.

A rough number is 8.5 PSI differential. The cabin altitude would be at
7,000 to 8,000 feet.